I have a dead animal or mouse in my wall
Question: I think I have a dead animal in one of my walls. Is it a mouse? How long will it take to decompose? What can I do about it?
Answer: Dealing with a foul odor in your home can be alarming, especially if you suspect it’s coming from behind a wall. In some cases, the cause may be a rodent or other animal that found its way indoors and didn’t make it out. Here’s what to know if you think a dead animal might be trapped in your walls.
What happens when an animal dies in a wall?
When an animal dies inside a wall, one of the first signs is usually a strong, unpleasant smell. As the body decomposes, it releases gases that can linger for days or even weeks. The exact timeline depends on factors like the size of the animal, temperature, and humidity levels. In general, it may take about 1 to 2 weeks for a small animal like a mouse to fully decompose, while larger animals like squirrels or rats can take longer. You may also notice flies gathering near the area or hear scratching noises leading up to when the smell begins.
How do you get a dead animal out of your wall?
Locating and removing a dead animal from a wall can be difficult. The smell might help narrow down the area, but finding the exact location often requires cutting into walls or accessing hard-to-reach spaces. Once the animal is removed, the area should be cleaned and disinfected to help eliminate odors and prevent other pest issues.
If you’re dealing with this situation, it’s best to reach out to a professional for help with safe removal and sanitation.
How long does it take for a dead animal to stop smelling?
The smell can last anywhere from a few days to several weeks. Factors like the size of the animal, temperature, and ventilation all affect how quickly the body decomposes. Smaller animals may stop smelling within a few days, while larger animals, such as raccoons, can take longer.
If you suspect rodents or wildlife are getting into your home, Orkin can help. Our Pros are trained to identify entry points and develop a customized pest control plan to help keep unwanted pests out.
Related Questions
Orkin used the information above to also answer the following questions submitted by Orkin.com users:
Question: I think I have a dead mouse or rodent in the wall or ceiling or possibly in the heating duct work in the house? What should I do?
Question: How to get rid of mice that are in the walls, and how much does it cost?
Question: A foul odor was noted in our storage room. I suspect a dead mouse. What do you suggest for removal of odors? I can’t locate the source. How long will the smell last?
Answer: The odor will last about 10 days or perhaps a bit longer. There is no certain way that the dead mouse can be found, and there are no chemicals that will take the odor away. Mouse baits may be effective, but often the mouse dies behind the wall and there is a lingering odor for several weeks, this is why use of rodent baits indoors is not a recommended course of action.
More Information
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